**USUAL DISCLAIMER: if you do this yourself you'll get electrocuted, and this is a dumb way to possibly die** Found a portable black-and-white CRT TV at a thrift store and was inspired to hack the circuitry a bit, both for the aesthetic and general electronics practice. This type of TV was pretty ubiquitous in the 80s as a portable gadget (for kitchen, picnics, camping, etc), and is quite cheaply/simply built - but also has no bells and whistles such as RCA video jacks, etc, just regular VHF tuner as source. The device being cheap and hackable, there are a few online resources on how to convert these for direct video input. After a couple false starts, I eventually managed to trace the video signal lead on the main PCB, then connected it to a standard analog source. The internal voltage levels were not quite NTSC-compatible, so I hacked in a voltage divider, soldered on a TRRS cable, and voila - tiny Raspberry Pi monitor! Even got the sound leads connected, too.
Not sure I would want to hang on to a CRT longer than necessary. They are a disposal issue and someday authorities will charge to take them. I got rid of mine while the going was good. There is a fair bit of lead in the glass.